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Bertha BH-882 Build
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UpComingSound View Drop Down
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Joined: 21 June 2006
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Points: 393 		Post Options Post Options   Thanks (0) Thanks(0)   Quote UpComingSound Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2016 at 2:28pm
Originally posted by MrZuarth MrZuarth wrote:

Audio AL how did these cabinets sound ?
Sorry a question, you did height of 21 inches?
 
Originally posted by Audio_AL Audio_AL wrote:


View of the driver after being glued in place.

Outer shell in place.

Last side and 45 degree reflectors in place.

Got a little creative with the braces  :)

Braces from behind.

And a shot from the front.

Im hoping to have the top on and begin testing today. More pics soon.
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Points: 99 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CritikalMass Quote  Post ReplyReply Direct Link To This Post Posted: 21 October 2013 at 7:37pm
Update on the second build! Perhaps a video ?
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Audio_AL View Drop Down
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Points: 244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Audio_AL Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2013 at 3:59am
Originally posted by MrZuarth MrZuarth wrote:

Sorry a question, you did height of 21 inches?
  

I don't remember exactly but I think it was close to 21 inches Yes.
Make it loud!
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Points: 107 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MrZuarth Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2013 at 1:53am
Sorry a question, you did height of 21 inches?
 
Originally posted by Audio_AL Audio_AL wrote:


View of the driver after being glued in place.

Outer shell in place.

Last side and 45 degree reflectors in place.

Got a little creative with the braces  :)

Braces from behind.

And a shot from the front.

Im hoping to have the top on and begin testing today. More pics soon.
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MrZuarth View Drop Down
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Points: 107 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MrZuarth Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2013 at 1:52am
Sorry a question, you did height of 21 inches?
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Lee In Montreal View Drop Down
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Points: 345 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee In Montreal Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2013 at 12:33pm
A local shop has 96 x  2242H woofers at $299.00 a pop. i'm picking a pair this week to use with this project.
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Points: 182 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Laurin Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2013 at 12:24pm
Originally posted by Lee In Montreal Lee In Montreal wrote:

Originally posted by nomercy82 nomercy82 wrote:

Post pictures when you're done. I'm curious about your design. How does a 1 foot extension of horn length make up for a 3 foot hyperbolic extension?


Like that. With a 36" deep extension, it makes it "theorically" a 21Hz horn once the back chamber and throat size are tuned for a JBL 2242. Without the extension, it is a 27Hz horn for a 1/4 wave. Theorically. ;-)




Hey Lee Richard had something like this but 96" wide.
It was called the model D.

http://www.wavemusic.com/community/showthread.php?t=7511&highlight=emerald

My next step will be a version with two 21".  
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Points: 811 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 16 February 2013 at 2:41am
Originally posted by Audio_AL Audio_AL wrote:

T-bone, i came up with the plans for the single driver version myself. It was no exact science. The height is approximately half of the two driver version. I do not have a set frequency yet. It sounds good at 120 and has even more punch when ran up to 140. I think it will depend on the specific situation and if i have dedicated kick bins down the road. As for the amp, i currently am using a behringer ep4000 :'( but i am in the market for something new and fancy (any suggestions anyone?). For the driver i had someone sim it and it performed very well. I also wanted a driver that i could put into a 186 horn if i need something with a smaller form factor.


Don't frown that's a good amp.
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Lee In Montreal View Drop Down
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Points: 345 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee In Montreal Quote  Post ReplyReply Direct Link To This Post Posted: 05 February 2013 at 3:01pm
BTW I wonder if I should open a new thread showing how a half-Bertha/Emerald can be used with two 15" drivers and cut (again) in half, making them very easy to move around as the new singles would be 48" deep x 30" wide x 24" tall. Four units with four 15" woofers would be the equivalent of two Emeralds with two 18" drivers.

Lee
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Lee In Montreal View Drop Down
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Points: 345 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee In Montreal Quote  Post ReplyReply Direct Link To This Post Posted: 04 February 2013 at 6:34pm
Originally posted by nomercy82 nomercy82 wrote:

Post pictures when you're done. I'm curious about your design. How does a 1 foot extension of horn length make up for a 3 foot hyperbolic extension?


Like that. With a 36" deep extension, it makes it "theorically" a 21Hz horn once the back chamber and throat size are tuned for a JBL 2242. Without the extension, it is a 27Hz horn for a 1/4 wave. Theorically. ;-)




Edited by Lee In Montreal - 04 February 2013 at 10:07pm
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Audio_AL View Drop Down
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Points: 244 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Audio_AL Quote  Post ReplyReply Direct Link To This Post Posted: 04 February 2013 at 2:23am
No, T-Bone. Im not from ALabama. AL is my nickname.
Make it loud!
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Points: 345 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee In Montreal Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2013 at 10:37pm
Bullets (or any other extra tweeters) are not needed with a JBL 2360. The 2360 only requires CD correction. 6db per octave from 3Khz.
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